On Fri, 14 Aug 2015 15:15:26 +0200, Tim Daneliuk <tundra at tundraware.com> wrote:> I just built a 10.2 machine on a cloud-based VPS (Digital Ocean) that has > 512M of memory and 1G of swap partition. I am seeing a ton of errors > like > this: > > Aug 14 00:01:22 myhost kernel: swap_pager_getswapspace(10): failed > Aug 14 00:01:22 myhost kernel: swap_pager_getswapspace(14): failed > Aug 14 00:01:22 myhost kernel: swap_pager_getswapspace(11): failed > Aug 14 00:01:22 myhost kernel: swap_pager_getswapspace(6): failed > Aug 14 00:01:22 myhost kernel: swap_pager_getswapspace(7): failed > Aug 14 00:01:22 myhost last message repeated 2 times > > > So, I added this to fstab (after creating /usr/swap0): > > md99 none swap sw,file=/usr/swap0 0 0 > > And then did this: > > swapon -aq > > > But, when I do a swapinfo, all I can see is the "disk" swap partition > that comes standard with the VPS: > > > Device 1K-blocks Used Avail Capacity > /dev/gpt/swapfs 1048576 456572 592004 44% > > > > Two questions: > > 1) Is this reasonable behavior from a machine wiht 512M of memory and > a 1G swap partition? I am doing things like running clamscan and > buildworld at the same time. That's why I tried to add space with > a file. > > 2) Why doesn't the extra swap disk appear in the hostinfo output. >Does the /dev/md99 device exist now? Otherwise something went wrong when you tried adding swap. Try swapon -a without the -q. Ronald
On 08/14/2015 08:35 AM, Ronald Klop wrote:> Does the /dev/md99 device exist now? Otherwise something went wrong when you tried adding swap. Try swapon -a without the -q.Yes, the device exists and yes, swapon claims is is in use: swapon -a swapon: md99 on /usr/swap0: Device already in use But swapinfo doesn't know about it, if it is: swapinfo Device 1K-blocks Used Avail Capacity /dev/gpt/swapfs 1048576 500300 548276 48% I don't know whether this is just an artifact of how swapinfo reports things, but the system acts like it's not seeing the additional swap when it is under heavy load. The main culprit here, BTW, is clamav which chews through memory like crazy as best as I can determine, and this is a VM with only 512M of memory, hence the desire to increase swap space. -- ---------------------------------------------------------------------------- Tim Daneliuk tundra at tundraware.com PGP Key: http://www.tundraware.com/PGP/